Keywords: Desert Drop-off (12747392483).jpg Marines with 2nd Battalion 7th Marine Regiment disembark a CH-46 Sea Knight helicopter during a squad competition at the Marine Corps Air Ground Combat Center Twentynine Palms Calif Feb 12 2014 The helicopter provided initial transport to the nearly 10-mile course where squads then navigated the different obstacles on their own U S Marine Corps photo by Lance Cpl Charles Santamaria/Released https //www flickr com/photos/marine_corps/12747392483/ Desert Drop-off 2014-02-11 22 41 https //www flickr com/people/40927340 N03 Marines from Arlington VA United States PD-USGov United States Marine Corps Official Page https //flickr com/photos/40927340 N03/12747392483 2016-09-03 22 13 22 United States Government Work Amphibious forces |